There is a guy on the forum here who has added 6 more Nikon SB-R200 flashes to his Nikon R1C1 system and he used it as his main light for portraits. Try doing a search and you may be able to see his setup.
Ok....seems like only Canon and Olympus have ring flashes? And it seems like the Canon one is not really a ring flash.
Looks like a twin flash setup within a ring?? But I do like the compactness of the controller.
The olympus one tho' controller too big. A bit bulky.
Anyone know of any system that has a wireless setup? I am not keen on the Metz ring flash cos it is actually a twin flash rather than a true ring flash, and I do not like to pop the flash up to control the ring flash.